Malware Analysis Report

2024-08-06 14:49

Sample ID 240617-jnh9sa1cmc
Target game.zip
SHA256 7d464799fbedc34f51aa2baae1c97ab9d795ff8a3cfc8c394d8cd13343fd687b
Tags
nanocore evasion keylogger persistence spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7d464799fbedc34f51aa2baae1c97ab9d795ff8a3cfc8c394d8cd13343fd687b

Threat Level: Known bad

The file game.zip was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Nanocore family

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Program Files directory

Unsigned PE

Kills process with taskkill

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Remote System Discovery
T1018
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-17 07:48

Signatures

Nanocore family

nanocore

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-17 07:48

Reported

2024-06-17 07:49

Platform

win10-20240611-en

Max time kernel

19s

Max time network

26s

Command Line

"C:\Users\Admin\AppData\Local\Temp\game.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Service = "C:\\Program Files (x86)\\SMTP Service\\smtpsv.exe" C:\Users\Admin\AppData\Local\Temp\game.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\game.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\SMTP Service\smtpsv.exe C:\Users\Admin\AppData\Local\Temp\game.exe N/A
File opened for modification C:\Program Files (x86)\SMTP Service\smtpsv.exe C:\Users\Admin\AppData\Local\Temp\game.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\PING.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\game.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4416 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 3544 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 3544 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 3544 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\schtasks.exe
PID 4416 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\cmd.exe
PID 4416 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\cmd.exe
PID 4416 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\game.exe C:\Windows\SysWOW64\cmd.exe
PID 2784 wrote to memory of 4312 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2784 wrote to memory of 4312 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2784 wrote to memory of 4312 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2784 wrote to memory of 3204 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2784 wrote to memory of 3204 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE
PID 2784 wrote to memory of 3204 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\PING.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\game.exe

"C:\Users\Admin\AppData\Local\Temp\game.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /delete /f /tn "SMTP Service"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /delete /f /tn "SMTP Service Task"

C:\Windows\SysWOW64\cmd.exe

"cmd.exe" /C taskkill /f /im "game.exe" & ping -n 1 -w 3000 1.1.1.1 & type nul > "C:\Users\Admin\AppData\Local\Temp\game.exe" & del /f /q "C:\Users\Admin\AppData\Local\Temp\game.exe"

C:\Windows\SysWOW64\taskkill.exe

taskkill /f /im "game.exe"

C:\Windows\SysWOW64\PING.EXE

ping -n 1 -w 3000 1.1.1.1

Network

Country Destination Domain Proto
US 8.8.8.8:53 local-quote.gl.at.ply.gg udp
US 147.185.221.20:26704 local-quote.gl.at.ply.gg tcp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp

Files

memory/4416-0-0x0000000073651000-0x0000000073652000-memory.dmp

memory/4416-1-0x0000000073650000-0x0000000073C00000-memory.dmp

memory/4416-2-0x0000000073650000-0x0000000073C00000-memory.dmp

memory/4416-19-0x0000000073650000-0x0000000073C00000-memory.dmp